Developer Guide and Reference

Contents

Intrinsics to Read and Write Registers

The prototypes for Intel® Streaming SIMD Extensions (Intel® SSE) intrinsics to read from and write to registers are in the
xmmintrin.h
header file.
To use these intrinsics, include the
immintrin.h
file as follows:
#include <immintrin.h>
Intrinsic Name
Operation
Corresponding
Intel® SSE Instruction
_mm_getcsr
Return control register
STMXCSR
_mm_setcsr
Set control register
LDMXCSR

_mm_getcsr

unsigned int _mm_getcsr(void);
Returns the contents of the control register.

_mm_setcsr